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XXIV. — On the Distribution and Classification of the older or Palaeozoic 

 Deposits of the North of Germany and Belgium, and their comparison with 

 Formations of the same age in the British Isles. 



By the Rev. ADAM SEDGWICK, F.R.S., F.G.S., 



Woodwardian Professor in the University of Cambridge ; 



And RODERICK IMPEY MURCHISON, Esq., F.R.S., F.G.S., &c. 



(Followed by a Description of the Fossil MoUusca, by Viscount d'Archiac and M. E. de Verneuil, 

 Members of the Geological Society of France, &c. &c.) 



[Read May 13 and 27, 1840.] 



Plates XXIII. to XXXVIII. 



CONTENTS. 



Introduction, p. 222. 



PART I. 

 Right bank of the Rhine, p. 228. 



Carboniferous rociis of Westphalia, p. 228. 

 Coal-measures, p. 228. 

 Carboniferous limestone, p. 229. 

 Groups belowthe carboniferous system, p.235. 

 Devonian rocks, p. 235. 



Limestone and shale of Mettmann, El- 



berfeldt, Hagen, Iserlohn, &c., p. 235. 



Eastern prolongation of the Devonian 



rocks to Meschede and Brilon, p. 238. 



Calcareous rocks near Bensberg, Paff- 



xath, &c., p. 241. 



Paffrath group, p. 242. 

 Gladbach group, p. 243. 

 Refrath group, p. 243. 

 Bensberg, p. 243. 

 In Nassau, &c., p. 244. 

 VOL. VI. SECOND SERIES. 



Devonian rocks (continued). 



Limestones of Oberscheld, Sessa- 



cher, &c., p. 246. 

 Copper-mines of Dillenburg, p. 247. 

 Of the Lahn, p. 248. 

 Schaalstein, p. 249. 

 Limestones, p. 250. 

 Silurian rocks, p. 252. 



Black slates of Wissenbach, p. 253. 

 Silurian Grauwacke, p. 256. 

 Eruptive rocks — mines — dislocations, &c., 

 p. 263. 



PART TL 

 Left bank of the Rhine, p. 267. 



Carboniferous rocks of Belgium, p. 267. 

 Successive groups between the coal-field of 

 Liege and the Ardennes, p. 269. 

 Terrain anthraxifere, p. 269. 



Description of the successive 

 groups: p. 271. 



2g 



